jet pump troubleshooting

I installed a two line jet pump for a water holding tank...when I turn it on the pump kicks on for two sec then kicks off..it does that about every min...it want build pressure and keep pressure on the water line... what could be the problem?

I installed a two line jet pump for a water holding tank...when I turn it on the pump kicks on for two sec then kicks off..it does that about every min...it want build pressure and keep pressure on the water line... what could be the problem?